Trustees



plan of what is shown in Fig. 1.

UNITED STATES PATENT OFFICE.

XVELLINGTON P. KIDDER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO WELLINGTONP. KIDDER, OF SAME PLACE, AND CHARLES R. BISHOP, OF NEW HAVEN,CONNECTICUT, TRUSTEES.

SPECIFICATION forming-part of Letters Patent N 0. 567,242, datedSeptember 8, 1896. Application filed April 23, 1894. Renewed July 8,1896. Serial No. 598,485. (No model.)

To aZZ whom it may concern: Be it known that I, WELLINGTON P. KID- DER,of Boston, in the county of Sufiolk and State of Massachusetts, haveinvented a new 5 and useful Improvement in Type-lVriters, of

which the following is a specification, reference being had to theaccompanying drawings, in which Figures 1 and 2 exhibit my inventiondis- Connected from the old structure upon which it is an improvement,Fig. 1 being a side view of my new toggle-joint connection for atype-carrier and key-lever, with other features of my invention, andFig. 2 being a top Fig. 2 is a view showing the type-bar in printingposition and the members of the toggle and their pivots in line witheach other. Fig. 3 is a sectional elevation showing so much of an oldstructure as will suffice to show the connection of my present inventiontherewith.

My invention is an improvement in typewriters of the end-thrust type-barclass set 2 5 forth in my Letters Patent Nos. 471,794 and 471,795, bothgranted March 29, 1892, and in my pending applications, Serial Nos.468,607, filed March 31, 1893, and 506,444, filed April 3, 1894; but thedifferent features of myin- 'vention may be embodied, if desired, inother styles and kinds of type-writing machines, and I wish to beunderstood as herein claiming my invention in thebroadest manner that islegally permissible. I The object of my invention is to produce anapproximately noiseless type-writing machine and also one in which theimpression is given by a dwelling pressure rather than by a quick sharpblow.

An important feature, of my construction consists in the combination ofa platen and impression key-lever with an endthrust type-carrier andtoggle, the toggle members and type carrier being substantially in astraight line whenthe impression is taken.

The particular features of my invention arepointed out hereinafter; i

In the drawings, in which -I showmy invention embodied in a type-writerof the kind set forth in my said Letters Patent, this being one of manycontemplated embodiments of my invention and the best form now known tome, 1 is the impression key-lever, adapted to be pivoted to any suitablesupport; 2, a link pivoted thereto and to a rocker-arm 3, which ispivoted to any suitable support 4.

Rocker-arm 3 is provided with a projection 3* for the pivotal attachmentat of the link 2 at one side of the pivot or center 3***, so that whenlink 2 is pulled down to straigthen the toggle members 3 and 5 the pullon the rocker-arm or toggle member 3 is not on a dead-center and theparts are readily operated to move the type head or carrier 6 toimpression. Rocker-arm 3 forms one memher of a toggle, the other memberthereof being link 5, which is pivoted to the rocker-arm .3 and also tothe end-thrust type-carrierfi,

which is provided with a suitable table or ledge-like guide-support 7,that supports, and with an upper guide 7 that helps to direct andcontrol, the type-carrier in its endwise movement to and from the platen8. Depression of key-lever 1 draws link 2 downwardly, and rocker-arm 3is thereby swung forward, bringing link 5 in line with the typecarrier6, connected thereto. WVhen rockerarm 3 completes its full movement, itis in line with link'5 and the type-carrier presses against the platen8, being guided thereto by the table 01' ledge-like guide-support 7, ofany suitable construction. This guide 7 supports 7 the type-carrier 6during the forward and back movements thereof, while guides 7 a and 7",which are placed at the impression-point, 85 compel the type-head tocontact unwaveringly with and to run straight againstthe platen. 1

.The toggle action of rocker-arm 3 and link 5 is such that theimpression is obtained by a pressure which is characterized by a slightdwell as distinguished from a quick sharp blow and from a rockingmovement of the type on the paper that renders impression indistinctandblurred. To accomplish this 5 valuable result, the forward orimpressiongiving movement of the type-carrier isarrested at the instantof impression, the type carrier and link 5 and rocker-arm 3, in otherwords, the type-carrier and toggle members, being made of the lengthrequisite for this purpose. This is my preferred construction but I donot limit my invention to this specific feature.

To insure a minimum of noise in the operation of the machine, I mount apad 9 (say, of rubber) in the path of the link 5, against which the linkstrikes when in line with the type-carrier 6, and place another pad 10back of link 2, so that the link 2 strikes against a pad on its backstroke. The key-lever 1 and connected parts referred to are returned totheir position of rest by spring-pressure, as will be readily understoodby all skilled in the art, although for the sake of more clearly showingthe operation of my new toggle con nection I show a spring 11 interposedbetween the key-lever and bottom of the machine; but it will of coursebe understood that the spring return of the key may be obtained in manydiiferent ways without departing from my invention.

In the construction shown, the key-lever 1 extends from the front orkey-board side of the machine rearwardly underneath or at one side ofthe table or ledge-like supportingguide 7, and is pivoted to the machineat 1* well toward the platen. Type head or carrier 6 is provided with aplurality of character's'at 6*, 6 and '6 and the table or ledgelikeguide-support7 is common to a plurality of type-heads, as described inmy said Letters Patent, including No. 471,7 95, dated March 29, 1892,and as shown in the wellknown Wellington type-writer, now made under mypatents. The support 7 is preferably horizontal, as shown.

In order to secure approximately exact uniformity of impression, Iprovide means for adjusting and controlling the throw of thetype-carrier. By so doing, a period, for example, is made to printwithout injury to the paper, and all the types are brought into suchnice relation one with the other that each gives its impression withreference to the formation of its work-surface and that of the othertypes. To accomplish this important and valuable result in theparticular form of machine shown, I make support etadjustable and clampit upon a rest 12 by means of a p a nping-screw 13, passing through aslot 14 in support 4 and entering rest 12, which is provided with aset-screw 15, which engages the butt-end of support 4. By looseningclampingscrew 13 support a is readily moved into any desired position onits rest 12 and secured in the desired position by the clamping-screw 13and set-screw 15, whereby the range of movement of the type-carrier isadjusted and controlled. It will be readily understood by all skilled inthe art that this adjustment may be obtained in many different ways, andI do not limit myself to any special form of means for adjusting themovement of the type-carrier in relation to the platen.

In Fig. 3 I show the parts above described in connection with so much ofmy ellington machine set forth in my said Letters Patent as is necessaryto show the connection of the features of my present invention with whatprecedes it in the art.

It will be seen that the end joints of the toggle are in a straight linewith the platen at all times, and that all three of the togglejoints arein the same straight line when the type head or carrier is atimpression.

What I claim is 1. In atype-writing machine, the combination of aplatenand impression key-lever with an intermediate end-thrust type-carrierand toggle operatively connected together and with the impressionkey-lever and aledge-like type-carrier support intermediate the platenand the free end of the key-lever, the toggle driving the type-carrierto impression, but arresting the impression-stroke of the typecarrier atthe instant of impression, substantially as and for the purpose setforth.

2. In a type-writing or like machine, the combination of a platen andimpression keylever with an intermediate end-thrust typecarrier andtoggle operatively connected together and with the impression key-lever,a guide-support for the type-carrier; the impression-key being pivotedat one side of the guide-support, and a link connecting a toggle memberwith the impression key-lever; the joints of the toggle being in asubstantially straight line at impression, substantially as and for thepurpose set forth.

3. In a type-writing or like machine, the combination of a platen andimpression keylever with an intermediate end-thrust typecarrier andtoggle operatively connected together and with the impression-key; aguidesupport for the type-carrier during its movement from and towardthe platen, a link connecting the impression key-lever with atogglemember and a guide, at the impressionpoint, for the head of thetype-carrier, substantially as and for the purpose set forth.

4. In a type-writing or like machine, the combination of a platen andimpression keylever with an intermediate end-thrust typecarrier andtoggle operatively connected together and with the impression key-lever,a link which connects the impression key-lever with a toggle member atone side of a pivotal connection thereof and a guide-support for thetype-carrier during its movement from and toward the platen,substantially as and for the purpose set forth.

5. In a type-writing or like machine, the combination of a platen andimpression key lever with an intermediate end-thrust type carrier andtoggle operatively connected together and with the impression key-lever,ledge-like support for the type-carrier; a link connecting a togglemember with the impres- IIO combination of a platen, and impressionkeylever with a toggle and end-thrust type-carrier; a link connecting amember of the toggle with the impression key-lever, and a guide at theimpression-point for the head of the type-carrier, the link extendingacross the plane of the path of the type-head from one toggle member tothe impression key-lever pivoted at one side of said plane,substantially as and for the purpose set forth.

7. In a type-writing or like machine, the combination of a platen andimpression key lever with an end-thrust type-carrier and toggle; a linkconnecting a toggle member with the impression key-lever; aguide-support for the type-carrier during its movement from and towardthe platen; a pad for the toggle when straightened; and a pad at therear of said link against which the link strikes on its back stroke, allsubstantially as and for the purpose set forth.

S. In a type-writing or like machine, the combination of an end-thrusttype-carrier, a horizontal ledge-like guide-support therefor during itsmovement from and toward the platen; a toggle and impression key-lever alink connecting the toggle with the impression key-lever which ispivoted toward the platen, at one side of said support and eX- tendsforwardly beyond said support; and an adjustable bracket to which onetoggle member is pivoted, the other toggle member being pivoted to thetype-carrier, substantially as and for the purpose set forth.

9. In a type-writing machine, the combination of an impression-key; alink connected therewith; a toggle, one member of which is pivoted inthe machine and connected with said link; a type-carrier with which theother member of said toggle is connected; a typecarrier guide comprisinga table or ledge across which the type-carrier moves; and a platen; saidtable being between the platen and the front of the machine, and theimpression-key being pivoted at one side of said table, substantially asand for the purpose set forth.

10. In a type-writing machine, the combination of a platen; a type-head;guides to control the type-head at impression; a table or ledge-likesupport for the type-head during its movements from and toward theplaten; a toggle, one member of which is connected with the type-headand the other member of which is pivoted in the machine; the centers ofthe toggle being at one side of said support; an impression-key pivotedat the other side of said support, and a link connecting said impressionkey-lever with one of the toggle members, substantially as and for thepurpose set forth.

11. In a type-writing machine, the combination of a platen; a type-head;guides to control the type-head at impression; a table or ledge-likesupport for the type-head during its movements from and toward theplaten; a toggle, one member of which is connected with the type-headand the other member of which is pivoted in the machine, the centers ofthe toggle being at one side of said support and a toggle member havinga projection; an impression-key pivoted at the other side of saidsupport, and a link connecting said impression key-lever with saidprojection on a toggle'member, substantially as and for the purpose setforth.

12. In a type-writing machine, the combination of a type-head and asupport therefor with an impression key-lever; a toggle, one member ofwhich is pivoted in the machine and the other member of which isoperatively connected with the type-head; a link connecting theimpression key-lever with a toggle member; and a spring which returnsthe type-head and toggle to position of rest, after impression; theimpression key-lever being pivoted at one side of said support and thetoggle and type-head being on the other side thereof, substantially asand for the purpose set forth.

WELLINGTON P. KIDDER. Witnesses:

'WENDELL A. ANDERSON,

O. M. STANTON.

